Title:
Teaching machine
United States Patent 3383781

Inventors:
Jean, Diuzet Emile
Publication Date:
05/21/1968
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Assignee:
Nouvelles, Tech Radioelectrique
Primary Class:
434/310
Other Classes:
434/325
International Classes:
G09B7/04; G09B7/08; G09B7/00
US Patent References:
3145268Multi-track pecord-reproduce system with servo controlled track selector
3191315Teaching machine